Dental tooth-regulating screw



(No Model.) 2 sheet -sheen 1.

, E. H. ANGLE;

DENTAL TOOTH REGULATING SCREW. No. 399,177. Patented Mar. 5, 1889.

i WQ/AOQO g'vwawlfov 664mm QA KW $3 13 atto'cmplid'fhfl N. PETERS. Phoio-ljtbognpner. Washington D. C

2 Sheets-Sheet 2.

(N0 Moglel.)

E. H. ANGLE.- DENTAL TOOTH REGULATING SCREW. No. 399,177. Patented Mar. 5, 1889'.

1 0' meow,

Z 7 1 MM 851 A @Hozum N4 PETERS PhMa-Ulhogrwhzr. Waahhglon. D. Q

UNITED STATES PATENT EEicE.

EDWARD ll. ANGLE, OF MlNNEr-iPOlJS, MTN'NESOTA.

DENTAL TOOTH-REGU LATING SCREW.

SPECIFICATION forming part of Letters Patent No. 399,177, dated March 5, 1889. Application filed February 18, 1888. aerial No. 264,531. (No model.)

To (tZZ whom it may concern:

Be it known that I, EDWARD H. ANGLE, a citizen of the United States, and aresident of the city of Minneapolis, county of Hennepin, State of Minnesota, have invented a certain new and useful Regulating Device for use in Dentistry, of which the following is a specification, reference being had to the aceompan ying d rawin My invention relates to dentistry, and has for its object to provide an efficient device for regulating the teeth, which shall at the same time be simple in construction, easy of application, cleanly, and cause a minimum of discomfort to the patient. Its construction is hereinafter fully described, and particularly pointed out in the claim.

In the drawings, like letters referring to like parts, l 'igure l is a plan view ol part of the human jaw, showing my device in working position to accomplish one class of movements possible by the device. Fig. 2 is a side view of the same, showing partof the jaw cut away, illustrating the device as applied to draw a tooth backward in the line of the arch. Fig. 3 is a plan view of partof the human jaw with the device in working position to accomplish another class oi? movements pos: sible by the device to push a tooth (mtward, and Fig. i; is a side view ol the some, showing part of the jaw cut away that the working and etlect of the device as applied in l ig. 1-3 may be. better shown.

The device is composml oi a screw-iii readed shalt, A, providml with a right-angled extremity, a, a short tubular sheath or resistance-tube, i l, ol smooth bore and open at both ends, within which tube said delivory-shaft A accurately tits and may pass in either direction, a screw-tiireaded nut, fitting said delivery shall A, and which nut may be ap plied on said shaft at either end of the tube B, and thus either push or pull saidshaft through said tube, a short delivory-tube, 1), adapted to receive the right-angled extremity u, and suitable bands, and if, for attaehin g said tubes ll and D to the teeth, the tube 1; being rigidly soldered to the band or hands E, and the tube 1) being soldered to the.

similar manner to the band "F, which is ceband 1*.

The bands E and F, previously made ofproper size, are tightly cemented to the teeth.

The shaft A should be rigid and have but little or no spring.

This entire appliance or parts thereof to be made of any suitable metal or metals.

The application is shown in Figs. 1,9,3, and 4:, wherein G represents a portion of the human jaw, and H, K, K, T., and M represent teeth in the same. Of these the tooth L is represented as out of its normal position in the arch, and it is desirable to draw it backward in Figs. 'l and 2, and push it forward in Figs. 3 and i to its proper place in the dental arch. On some firmly-rooted tooth or teeth, as K K, in suitable position with reference to L, is cemented the band or hands E, to which is rigidly soldered the tube 13. On the tooth L is cemented the band F, to which is soldered ihetube 1) at right angles to the tooth and the delivery-shaft A. The screwihreadcd portion of the delivery-shaft A is passed through the tube 1), and the rightangled extremity a is placed in the tube D. The nut L" is then applied to the end of the shaft A projecting through the tube 13, if used to pull, as in Fig. l; but it used to puslnas in Fig. 3, the nut C is applied to the shaft A before placing in the tube 13, and is lin'ought to bear upon the end of the said tube opposite to the end used in pulling. By the proper adjustments *i'rom time to time the teeth may be moved to its proper position in the arch.

The especial. excelleneies ol' the device, in virtue of its constructimi and 2L1)])ll(3%1ll0il,fil as follows: in accordance with the natural law that action and reaction are equal and opposite in direction, the tooth to be moved, L, and the teeth serving as anchorages, K K, will move equally when equal forces are applied to the same, unless there be greater resistance offered by one than the other by means of more dense surroundings, or by means ol' such a device as shall prevent movement of the one and promote that of the other. This latter i'eatu re I claim to accomplish by my device, as I shall hereinafter point out.

As before stated, the tube l; rigidly soldered to the band or bands E, which are tightly cemented to the teeth, serving as anchorages, K K. The tube l) is soldered in merited to the teeth I.- to be moved. The shaft A being passed through the tube B,

bony surroundings, movement under which condition is rendered well-nigh impossible from the fact that the bone surrounding the apex of the root is much more dense than that surrounding the portions nearer the crown. The tooth L thus practically receives all the force transmitted through the shaft A by the turning of the nut O, and L, being so attached that it may tilt or move freely at its crown, is rapidly moved to its place in the dental arch, while the anchor-teeth K K either do not move at all or move so little that it is imperceptible, as movement under the conditions in which they must move is nearly or quite impossible. These points are shown in Figs. 2 and 4.

Another point of excellence my device obtains is that in consequence of the extremity a of the shaft A being at right angles to the line of movement of said shaft, and fitting accurately into the tube D, rotation of the moving tooth .L is impossible. This is shown in Figs. 1 and 3.

The device is also very cleanly, being so constructed as to lodge but little food, and that can be easily removed by ordinary means. The device is also superior in point of simplicity, comfort, and looks. The parts are few and easily made and applied. Being small, they do not greatly encumber or disfigure the mouth. The supreme importance of these points is well understood and appreciated by all practical dentists. To secure adequate resistance without disturbing the anchor-teeth, toprcvent rotation of the moving tooth, to prepare an appliance simple, cleanly, and comfortable, have always been points of great difficulty in regulating teeth.

Vhat I claim, and desire to secure by Letters Patent of the United States, is as follows:

The combination, with the resistance-tube and its band adapted to be cemented to the anchor-teeth, of the deliverytube and its band adapted to be cemented to the tooth to be moved at right angles to the resistance tube, a screw-threaded shaft having a body adapted to closely fit said resistance-tube and a right-angled extremity adapted to closely fit said delivery-tube, and a screw-threaded nut adapted to fit said screw-threaded shaft and bear against said resistance-tube, substantially as described.

EDlVARD H. ANGLE.

In presence of- CHAS. G. BROWN, EM A F. ELMORE. 

